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19 terms

chapter three Part 2 (eighth edition)

cells review
STUDY
PLAY
Active transport
uses ATP to Move solutes Across a membrane. requires carrier proteins.
symport system
two substances are moved across a membrane in the same direction (active transport)
antiport system
two substances are moved across a membrane in opposite directions (active transport)
primary active transport
hydrolysis of ATP phosphorylates the transport protein causing conformational change.
secondary active transport
use of an exchange pump (such as the na+-k+ pump) indirectly to drive the transport of other solutes
vesicular transport
transport of large particles and macromolecules across plasma membranes
exocytosis
moves substance from the cell interior to the extra cellular space
endocytosis
enables large particles and macromolecules to enter the cell.
transcyotosis
moving substances into, across, and then out of the cell
vasicular trafficking
moving substances from one area in the cell to another
phagocytosis
pseudopods engulf solids and bring them in the cells interior.
fluid-phase endocytosis
the plasma membrane infolds, bringing extracellular fluid and solutes into the interior of the cell
receptors-mediated endocytosis
clathrin-coated pits provide the main route for endocytosis and transcytosis
non-clathrin-coated vesicles
caveolae that are platforms for a variety of signaling molecules.
simple diffusion
uses kinetic energy, (ex.movement of o2 through membrane)
facilitated diffusion
uses kinetic energy; movement of glucose into the cells
osmosis
uses kinetic energy;movement of h2o into and out of the cells
Filtration
Hydrostatic pressure (formation of kidney filtrate)
active transport of solutes
uses ATP; movement of ions across membranes